Trimmer for strip material



Se t. I

p 1927 F. D. MASON TRIMMER FOR STRIP MATERIAL Filed Dec. 22; 1925 2 Sheets-Sma l INVENH'bR. @5074 D. M. BY 0 L ATTORNEY.

Sept.

1,642,998 'F. D. MASON TRIMMER FOR STRIP MATERIAL Filed Dec. 22. 1925 2 Sheets-She a! 2 A TTORNEY.

I Figure 8 is-a Patented Sept. 20, 1927.

A ppiication filed December 22,1925. Seria1N0.,.- 7 '6,9.88.

eewe wermgm i TRIMMER FOR s wil 1122- This invention relates to ,trimlners' for use on strip .f lnat'erial z'su'chas t rubber gwea ther strip, tire beads t or the frlik'e, or :other fstrjip Y material .a having rough for uneven; edges r or 5Qfi1is1clne'i to. the overflow ooasiondzydl ring thetimlchnizing 0..the" articlspf against longitudinal movement in its bear- 1 It is? the bbj eet offthe; invention .to; 1m-

lings; by; collars 1-7;? adj'ustablysecured thereon J prove upon existing.v mathinesior doing {this ;.on "one; slide; "of eah:bf -ibra ket n 1;"1 *vifork; one -rmrposertdf they-invention --b ei-ngto -:D1' ;1 ving gears. 118,3 8 a r d :t11e' -s11aft provide aniiimproyedzxiriving means *fiohop Eeratingboth:thefitrirhming units offla para-4f f -p 1 I, 2 P2 1E p Another. object of the vinvention is; to pro- :vide an improyedl mountin for: the eowopi5 erating trimmers fivherebjr i f the cnttersI-coi op'ra-te andsthe Cutting isperformed only at one point, thuslinsuring a neat an'daecurate cut'nnd pfov-idin'g clearance between 'the trimmers for? the stockto 'pass therefrom loafter t hecu'tt-in'goperation; Another objectfi's to' provide an improved t ouil'tingfor a rnov able trimmer unit Where- 1 by it will be readily removablet6; facilitate shar ening or: re lagen ents' f; 'ciittersg r'eadaptedto 'telescope intom news 19 and hav- --=and-' 1430f considerable length to proi ridenn "adj usttable driving 1 connection therebetween, lithe-"sleeve. 19' being adapted tofib seeur'ed #ovei -s-the *connectionrby "means ofwa *set screwi20e :Ihe bracket 16 is secured to the base 10 i by means of {bolts 213 21 engaged fthrough p I a ,t I zslo'ts- 22, ;122F1there'in. iWhen ithe beitsare A th bj t i to: provide an improved frem'ovedg the nnitsuppo'rte'd .-by and T includadj lls tmel lt-01111118it'limrrier klilfe to position 1 ing -braclre t :16 is reaidi'lyremovable froin the it, :p p l pwithflrespect'to tl 1*"cobpenati'ng? ibaseY lOifor*replaoeinefit 'and re'pairsa' rm- 'ckeftjlfi tojwa'rel end:from

40 e'is' m fronteleyation thereof e elt atioii thereof;

' Figiire I Yaildetail of t'h'e fsplit drive shafts are not placed alignment) but are spars; T Figu re 5 is a detail pla'n hem l poinfiwher i thehearin *action is Q 'anem of saidpmekets gln order. to permit. movement hrael zet ing cooperating; semi-cylindrical tongues 14 fihaff .is ;.split; "into.. two parts; 14* and-114 and other objects are obbra'fcket 15" b accom-plishedby pf point. of cutting whereby the already cut edges of the strip material will not be further engaged by the knives beyond the point of cutting to affect the edges thereof in any way. Each shaft 29 has thereon a drive gear 32 meshed with a gear 28 whereby the knives will be driven reversely from knives 27. Each knife 30 is adjustable into proper relation with a knife 27 by so mounting each shaft so that it is shiftable a slight distance longitudinally in its bearing, the adjustment being fixed by a knurled nut 33 thereon which bears against one end of the'bearing. Each nut 33 hasga set screw 33 therein for securing it in adjusted-posh tions. i i i To hold the material to be trimmed in .proper relation to the knives 27 and 30, there is provided a pressure roller, such as 85 or 36, shaped on its periphery tofit the upper surface of the material to be trimmed. The roller is adapted to I pass down between knives 30 to hold the material onto knives 2T. Rollers 35 or 36 are replaceably mounted for rotation on an arm 37 carrying a spindle 88 for receiving either roller and secured therein so as to be adjustable longitudinally of the machine by means of a thumb screw 39 to properly fit betweenknives 30. Arm 37 is preferably pivoted onto an extension bracket 40 on the top of bracket'lfi and thepressure rollers 35 or 36 may be releasably held thereon by means of a hand nut 41; Pressure on rollers 35 or 36 may be secured in any suitable manner, an extension 42. on arm 37 and carrylng an ad ustable weight 42 belng here shown. Arm 37 may be swunglupwardly to facilitate insertion of the materlal lDtO the machine and a PI'O]BC.

tion43 is provided thereon which is engaged in an arcuate slot iet in bracket 40, which slot terminates in a shoulder at 45 adapted to hold the pressure rollers 35 or 36 and arm 37 in the dotted line position shown in Figure 3.

A strip guiding device is shown in Fig ures 1 and3. This device comprises spaced apart vertically disposed rollers 46, 46 shaped substantially as inverted cones and relatively adjustable transversely of the machine in front of the'knives in a bracket 47 mounted on base 10. j j In the useof the machine to trim beads which are usually endless, the machine is set up and adj usted as shown in Figures 1 to 7, pressure roller being used. The head indicated in dotted lines is circun'iferentially driven through the machine by. action of knives 27 and roller 35 thereon and is pro gressively trimmed at the edges as clearly shown in Figure 6. In Figure 8 the machine i is shown performing a similar operation on weather strip material, the brackets 15 and 16 being ad usted closer together and pressure roller 36 being employed. The adjustment and replacement of the parts for various purposes will be readily understood from the description of the construction of the machine.

Modifications of the invention other than those disclosed herein may be resorted to without. departing from the spirit thereof or the scope of the appended claims.

What is claimed is:

l. A machine of the class described, comprising a nori'nally [ixed bracket, a pair of cooperating rotary trimming knives mounted thereon, a shiftable bracket, a pair of cooperating rotary trimming knives thereon arranged in alignment withcorresponding knives of the first pair, and means for simultaneously driving both pairs of knives, comprising a :drive shaft journaled in said brackets, said shaft beingtransversely split and having a sleevesecured thereon over the split, the split ends having relatively adjustable interlocking driving portions thereon, a gear on each section, and gears connected to each of said knives on each bracket and in mesh with each other, one ofsaid last named gears oneach bracket meshing with a gear on a shaft section.

2. A machine of, the classdescribed, comprising a normally fixed bracket, a pair of cooperating rotary trimming knives mounts ed thereon, a shiftable bracket, a pair of cooperating rotary trimming knives thereon arranged in alignment with corresponding knives of the first pair, and means for simultaneously driving both pairs of knives, comprising gears connected to each of said knives on each bracket and in mesh with each other, a drive shaft, and gears on said drive shaft, onebeing adjustable with i said movable bracket, and each of said last-- named gears being meshed with a knifedriving gear. i i i 3. A; machine of the class described, comprising a normally fixed bracket, a pair of cooperating rotary trimming knives mounted thereon, a shiftable bracket, said shiftable bracket having slots therein and bolts extending throngli said slots into the base for guiding the bracket whereby said bracket may be readily removed from the base, means for moving. the shiftable bracket, a pair of cooperatin rotary trimming knives on the shiftabe bracket arranged in alignment with corresponding knives of the first pair, andmeans for simul, taneously driving both pairs of knives.

-l-. A machine-of the class described, comprising a normally fixed bracket, a pair of cooperating rotary trimming knives 1nounted thereon, said knives being arranged in oii'set relationship and the axis of one of said knives being at a slight angle with respect to the other whereby the knives will engage substantially at one point only, a shift-able bracket, a similarly mounted pair of cooperating rotary trimming knives thereon arranged 1n alignment with corresponding knives of the first pair, and means 7 for simultaneously driving both pairs of knives. 1

5. A machine of the class described, comprising a normally fixed bracket, a pair of cooperating rotary trimming knives mounted thereon, the axis of one of said knives being at a slight angle with respect to the other whereby theknives will engage substantially at one point only, a slriftab le bracket, a similarly mounted pair of cooper- I ating rotary trimming knives thereon arranged in alignment with corresponding knives of the first pair, and means for simultaneously driving both pairs of knives.

6. Apparatus of the class described, cooperating rotary disc knives, shafts on which said knives are mounted, bearings for justed positions comprising a single nut threaded thereon between the knife and the adjacent end of the bearing and operable against said endof the bearing.

FREEMAN D. MASON. 

